Event Loop/IO Channel integration

[scott]

Integrate EventLoop? and IOChannel APIs

• Allow multiple IOChannels and FileChannels? to be added to an event loop
• All IO events must be operable before closing this item

[scott]

(In [24]) IOChannel Integration

• Made first steps toward integrating IOChannel with the event framework
• Added constants to IOChannel for watch types
  • IOChannel.READ for read-ready events
  • IOChannel.WRITE for write-ready events
  • IOChannel.READ_PRIORITY for read-now (buffer full type) high proprity events
  • IOChannel.ERROR for read/write error events
  • IOChannel.HANGUP for sig-hup and disconnect events
  • IOChannel.INVALID for other error types (closed filehandle, etc)
• Added close method to IOChannel objects
• Added watch method (currently non-functional)
• Fixed error handling
  • undefined references to sagot_iochannel_error
  • sagot_iochannel_error and GError object dereferencing problems
• Fixed read, readline, getc methods
  • Problem with return value assignments
  • Buffer lengths were using JSVAL_TO_DOUBLE which gives us poor behavior

Still lots of warnings at compile time

refs #45, #46

[scott]

This is currently working with GIOChannels through the FileChannel? interface as of [37].